When a blade cuts both ways, and past harms could scar future, I will help to mend, I am a

I'll show up with a hood; I'll put you in your place. Done many men for good; yet you'll sit in my embrace. Better watch your back; better watch that mirror, Or your bones I will crack, cause you didn't see it clearer. I might pass you on the street, but unless I'm seeing red; Better watch your feet, lest be in the hospital instead.

A salad with no tomatoes, but still run red. Stabbed in the back by the one called friend.

i lay in bed and close my eyes, no matter how hard, there's no surprise. in fibers counted, over fence they seek, elusive is my hope to seek. what am i, with this elusive thing I seek?

You'll name me yours, yet seldom beloved. You'll take me home; yet I'm often spurned. If we're finished; a lesson's learned. I'll leave you a number; and maybe a letter. But you'll never call me; and maybe that's better.